Heterometallic Transition Metal Oxides Containing Lewis Acids as Molecular Catalysts for the Reduction of Carbon Dioxide to Carbon Monoxide with Bimodal Activity.

ABSTRACT: Electrocatalytic CO₂ reduction (e-CO₂RR) to CO is replete with challenges including the need to carry out e-CO₂RR at low overpotentials. Previously, a tricopper-substituted polyoxometalate was shown to reduce CO₂ to CO with a very high faradaic efficiency albeit at -2.5 V versus Fc/Fc⁺. It is now demonstrated that introducing a nonredox metal Lewis acid, preferably Ga^III, as a binding site for CO₂ in the first coordination sphere of the polyoxometalate, forming heterometallic polyoxometalates, e.g., [SiCu^IIFe^IIIGa^III(H₂O)₃W₉O₃₇]^8-, leads to bimodal activity optimal both at -2.5 and -1.5 V versus Fc/Fc⁺; reactivity at

SUBMITTER: Azaiza-Dabbah D 

PROVIDER: S-EPMC11468775 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature